======================================
| xx__-> [    9.111565][  T173] ------------[ cut here ]------------
| [    9.111794][  T173] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: ip/173
| [    9.112052][  T173] Modules linked in:
| [    9.112519][  T173] Tainted: [W]=WARN
[    9.112627][  T173] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.112801][  T173] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.112989][  T173] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 88 e9 f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 88 e9 f0 ff       	call   0xfffffffffff0e9c4
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 88 e9 f0 ff       	call   0xfffffffffff0e99a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    9.113492][  T173] RSP: 0018:ffa00000007c7ab0 EFLAGS: 00010286
[    9.113668][  T173] RAX: 00000000ffffffa6 RBX: ff11000004be4580 RCX: 1ff40000000f8f1c
[    9.113929][  T173] RDX: 0000000000000007 RSI: 0000000000000000 RDI: ff11000004be463c
[    9.114137][  T173] RBP: ff11000009641000 R08: 1fe220000097c8c9 R09: ff1100000d422ed0
[    9.114342][  T173] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[    9.114559][  T173] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000009641000
[    9.114768][  T173] FS:  00007fc6cbc73840(0000) GS:ff11000088fac000(0000) knlGS:0000000000000000
[    9.115020][  T173] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.115194][  T173] CR2: 0000000000479648 CR3: 000000000c12b004 CR4: 0000000000771ef0
[    9.115411][  T173] PKRU: 55555554
[    9.115515][  T173] Call Trace:
[    9.115620][  T173]  <TASK>
[    9.115692][  T173]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.115835][  T173]  ? notifier_call_chain (kernel/notifier.c:85)
[    9.115981][  T173]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.116087][  T173]  register_netdevice (net/core/dev.c:11488)
[    9.116229][  T173]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    9.116411][  T173]  register_netdev (net/core/dev.c:11552)
[    9.116548][  T173]  loopback_net_init (drivers/net/loopback.c:218)
[    9.116687][  T173]  ops_init (net/core/net_namespace.c:137)
[    9.116794][  T173]  setup_net (net/core/net_namespace.c:446)
[    9.116903][  T173]  ? unregister_pernet_device (net/core/net_namespace.c:1503)
[    9.117041][  T173]  ? lockdep_init_map_type (kernel/locking/lockdep.c:4973)
[    9.117181][  T173]  ? mutex_init_lockdep (./include/linux/lockdep.h:135 ./include/linux/lockdep.h:142 kernel/locking/mutex.c:185)
[    9.117324][  T173]  copy_net_ns (net/core/net_namespace.c:579)
[    9.117470][  T173]  create_new_namespaces (kernel/nsproxy.c:132)
[    9.117611][  T173]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    9.117751][  T173]  ksys_unshare (kernel/fork.c:3243)
[    9.117895][  T173]  ? walk_process_tree (kernel/fork.c:3036 (discriminator 19))
[    9.118034][  T173]  ? __ia32_sys_open (fs/open.c:1374)
[    9.118175][  T173]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    9.118312][  T173]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[    9.118458][  T173]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.118593][  T173]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.118734][  T173]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.118872][  T173]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.119046][  T173] RIP: 0033:0x7fc6cbf35bcb
[    9.119193][  T173] Code: 73 01 c3 48 8b 0d 2d 82 0f 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d fd 81 0f 00 f7 d8 64 89 01 48
All code
========
   0:	73 01                	jae    0x3
   2:	c3                   	ret
   3:	48 8b 0d 2d 82 0f 00 	mov    0xf822d(%rip),%rcx        # 0xf8237
   a:	f7 d8                	neg    %eax
   c:	64 89 01             	mov    %eax,%fs:(%rcx)
   f:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
  13:	c3                   	ret
  14:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1b:	00 00 00 
  1e:	90                   	nop
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 10 01 00 00       	mov    $0x110,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d fd 81 0f 00 	mov    0xf81fd(%rip),%rcx        # 0xf8237
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d fd 81 0f 00 	mov    0xf81fd(%rip),%rcx        # 0xf820d
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[    9.119689][  T173] RSP: 002b:00007ffe223ee808 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[    9.119903][  T173] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007fc6cbf35bcb
[    9.120109][  T173] RDX: 0000000000000000 RSI: 0000000000477309 RDI: 0000000040000000
[    9.120313][  T173] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
[    9.120530][  T173] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe223f0a30
[    9.120739][  T173] R13: 0000000000000001 R14: 00007fc6cbc736f8 R15: 00007ffe223f284c
| [    9.150250][  T174] ------------[ cut here ]------------
| [    9.150430][  T174] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: ip/174
| [    9.150666][  T174] Modules linked in:
| [    9.151050][  T174] Tainted: [W]=WARN
[    9.151153][  T174] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.151318][  T174] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.151501][  T174] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 88 e9 f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 88 e9 f0 ff       	call   0xfffffffffff0e9c4
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 88 e9 f0 ff       	call   0xfffffffffff0e99a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    9.151974][  T174] RSP: 0018:ffa00000007d7030 EFLAGS: 00010286
[    9.152144][  T174] RAX: 00000000ffffffa6 RBX: ff11000004be5c40 RCX: 1ff40000000fadcc
[    9.152339][  T174] RDX: 0000000000000007 RSI: 0000000000000000 RDI: ff11000004be5cfc
[    9.152541][  T174] RBP: ff11000009641000 R08: 1fe220000097cba1 R09: ff1100000d420b68
[    9.152739][  T174] R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000001
[    9.152941][  T174] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000009641ce1
[    9.153139][  T174] FS:  00007f878e51f840(0000) GS:ff1100008912c000(0000) knlGS:0000000000000000
[    9.153371][  T174] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.153542][  T174] CR2: 0000000026d26988 CR3: 000000000cd75005 CR4: 0000000000771ef0
[    9.153740][  T174] PKRU: 55555554
[    9.153840][  T174] Call Trace:
[    9.153946][  T174]  <TASK>
[    9.154015][  T174]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.154151][  T174]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.154251][  T174]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[    9.154390][  T174]  __dev_notify_flags (net/core/dev.c:9787)
[    9.154524][  T174]  ? netif_change_name (net/core/dev.c:1495)
[    9.154653][  T174]  ? __dev_change_flags (net/core/dev.c:9752)
[    9.154783][  T174]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[    9.154919][  T174]  ? is_bpf_text_address (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/bpf/core.c:749 (discriminator 2))
[    9.155053][  T174]  netif_change_flags (net/core/dev.c:9820)
[    9.155186][  T174]  do_setlink.isra.0 (net/core/rtnetlink.c:3206 (discriminator 1))
[    9.155319][  T174]  ? rtnl_link_get_size (net/core/rtnetlink.c:716)
[    9.155457][  T174]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4040 (discriminator 3) kernel/rcu/tree.c:4032 (discriminator 3))
[    9.155620][  T174]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[    9.155755][  T174]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[    9.155887][  T174]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[    9.156024][  T174]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[    9.156157][  T174]  ? __kernel_text_address (kernel/extable.c:79)
[    9.156289][  T174]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    9.156427][  T174]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    9.156558][  T174]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:341 net/core/rtnetlink.c:4149)
[    9.156690][  T174]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    9.156822][  T174]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[    9.156957][  T174]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    9.157087][  T174]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    9.157220][  T174]  ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 22))
[    9.157352][  T174]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:820)
[    9.157490][  T174]  ? __mutex_lock (kernel/locking/mutex.c:798 (discriminator 1) kernel/locking/mutex.c:820 (discriminator 1))
[    9.157623][  T174]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:341 net/core/rtnetlink.c:4149)
[    9.157781][  T174]  ? ww_mutex_lock (kernel/locking/mutex.c:933)
[    9.157920][  T174]  ? __rtnl_newlink (net/core/rtnetlink.c:4000)
[    9.158055][  T174]  rtnl_newlink (net/core/rtnetlink.c:4150)
[    9.158189][  T174]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    9.158320][  T174]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[    9.158458][  T174]  ? __rtnl_newlink (net/core/rtnetlink.c:4027 (discriminator 1))
[    9.158588][  T174]  ? mark_usage (kernel/locking/lockdep.c:4674)
[    9.158719][  T174]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[    9.158853][  T174]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    9.158989][  T174]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[    9.159122][  T174]  ? __rtnl_newlink (net/core/rtnetlink.c:4027 (discriminator 1))
[    9.159253][  T174]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[    9.159390][  T174]  ? __rtnl_newlink (net/core/rtnetlink.c:4027 (discriminator 1))
[    9.159523][  T174]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7061)
[    9.159655][  T174]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[    9.159787][  T174]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[    9.159922][  T174]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    9.160055][  T174]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    9.160186][  T174]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[    9.160320][  T174]  netlink_rcv_skb (net/netlink/af_netlink.c:2551)
[    9.160457][  T174]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[    9.160590][  T174]  ? netlink_ack (./include/linux/skbuff.h:2718)
[    9.160725][  T174]  ? netlink_deliver_tap (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[    9.160858][  T174]  ? netlink_deliver_tap (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[    9.160995][  T174]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[    9.161130][  T174]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[    9.161262][  T174]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    9.161397][  T174]  ? __lock_acquire (kernel/locking/lockdep.c:453 kernel/locking/lockdep.c:5225)
[    9.161529][  T174]  netlink_sendmsg (net/netlink/af_netlink.c:1895)
[    9.161662][  T174]  ? netlink_unicast (./include/net/net_namespace.h:419 (discriminator 7))
[    9.161794][  T174]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[    9.161932][  T174]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    9.162065][  T174]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    9.162198][  T174]  ____sys_sendmsg (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2698 (discriminator 4))
[    9.162329][  T174]  ? copy_msghdr_from_user (net/socket.c:2635)
[    9.162461][  T174]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5349)
[    9.162622][  T174]  ? move_addr_to_kernel (./include/linux/audit.h:354 (discriminator 1))
[    9.162755][  T174]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[    9.162884][  T174]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[    9.163021][  T174]  ___sys_sendmsg (net/socket.c:2752)
[    9.163151][  T174]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3131)
[    9.163313][  T174]  ? copy_msghdr_from_user (net/socket.c:2603)
[    9.163459][  T174]  __sys_sendmsg (net/socket.c:2784)
[    9.163591][  T174]  ? __sys_sendmsg_sock (net/socket.c:2765)
[    9.163721][  T174]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3156 (discriminator 6))
[    9.163884][  T174]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[    9.164018][  T174]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    9.164148][  T174]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.164280][  T174]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.164416][  T174]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.164549][  T174]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.164711][  T174] RIP: 0033:0x7f878e75908e
[    9.164853][  T174] Code: 4d 89 d8 e8 94 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 94 bd 00 00       	call   0xbd9c
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[    9.165323][  T174] RSP: 002b:00007ffc6605a2b0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[    9.165523][  T174] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f878e75908e
[    9.165718][  T174] RDX: 0000000000000000 RSI: 00007ffc6605a360 RDI: 0000000000000005
[    9.165917][  T174] RBP: 00007ffc6605a2c0 R08: 0000000000000000 R09: 0000000000000000
[    9.166110][  T174] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a10d92a
[    9.166305][  T174] R13: 000000000049f620 R14: 0000000000000000 R15: 00007ffc6605aa30
| [   32.587418][   T12] ------------[ cut here ]------------
| [   32.587634][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#1: 0/12
| [   32.587900][   T12] Modules linked in: nf_conntrack_netlink nft_ct nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_numgen nf_tables
| [   32.588539][   T12] Tainted: [W]=WARN
[   32.588637][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   32.588799][   T12] Workqueue: netns cleanup_net
[   32.588943][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   32.589167][   T12] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 88 e9 f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 88 e9 f0 ff       	call   0xfffffffffff0e9c4
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 88 e9 f0 ff       	call   0xfffffffffff0e99a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   32.589713][   T12] RSP: 0018:ffa00000000c7748 EFLAGS: 00010286
[   32.589881][   T12] RAX: 00000000ffffffa6 RBX: ff1100000906a580 RCX: 1ff4000000018eaf
[   32.590080][   T12] RDX: 0000000000000007 RSI: 0000000000000000 RDI: ff1100000906a63c
[   32.590273][   T12] RBP: ff11000009641000 R08: 1fe220000120d4c9 R09: ff11000001afd260
[   32.590581][   T12] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000041
[   32.590774][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: ffa00000000c77e0
[   32.590970][   T12] FS:  0000000000000000(0000) GS:ff1100008902c000(0000) knlGS:0000000000000000
[   32.591209][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   32.591372][   T12] CR2: 00007fc012468000 CR3: 000000000ca8a006 CR4: 0000000000771ef0
[   32.591592][   T12] PKRU: 55555554
[   32.591689][   T12] Call Trace:
[   32.591832][   T12]  <TASK>
[   32.591901][   T12]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[   32.592037][   T12]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[   32.592135][   T12]  netif_close_many (net/core/dev.c:1804)
[   32.592263][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   32.592398][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   32.592526][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   32.592664][   T12]  ? __dev_close_many (net/core/dev.c:1781)
[   32.592792][   T12]  ? netif_close_many_and_unlock (net/core/dev.c:12330)
[   32.592949][   T12]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[   32.593083][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   32.593245][   T12]  ? mutex_is_locked (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.h:48 kernel/locking/mutex.c:65)
[   32.593373][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   32.593508][   T12]  ? default_device_exit_net (net/core/dev.c:13033 (discriminator 1))
[   32.593636][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   32.593799][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   32.593930][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   32.594061][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[   32.594189][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[   32.594317][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[   32.594451][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   32.594577][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[   32.594708][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   32.594838][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[   32.594970][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   32.595099][   T12]  cleanup_net (net/core/net_namespace.c:702)
[   32.595226][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[   32.595352][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   32.595488][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   32.595611][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   32.595734][   T12]  process_one_work (kernel/workqueue.c:3314)
[   32.595864][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   32.595990][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   32.596116][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   32.596244][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   32.596367][   T12]  kthread (kernel/kthread.c:436)
[   32.596467][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   32.596624][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   32.596751][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[   32.596880][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   32.597043][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   32.597171][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   32.597298][   T12]  ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
| [   32.600880][   T12] ------------[ cut here ]------------
| [   32.601043][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#1: 0/12
| [   32.601276][   T12] Modules linked in: nf_conntrack_netlink nft_ct nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_numgen nf_tables
| [   32.601871][   T12] Tainted: [W]=WARN
[   32.601968][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   32.602123][   T12] Workqueue: netns cleanup_net
[   32.602248][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   32.602409][   T12] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 88 e9 f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 88 e9 f0 ff       	call   0xfffffffffff0e9c4
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 88 e9 f0 ff       	call   0xfffffffffff0e99a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   32.602861][   T12] RSP: 0018:ffa00000000c7878 EFLAGS: 00010286
[   32.603014][   T12] RAX: 00000000ffffffa6 RBX: ff1100000565ae40 RCX: 1ff4000000018ed5
[   32.603190][   T12] RDX: 0000000000000007 RSI: 0000000000000000 RDI: ff1100000565aefc
[   32.603369][   T12] RBP: ff11000009641000 R08: 1fe2200000acb5e1 R09: ff11000001afd260
[   32.603555][   T12] R10: 0000000000000001 R11: 0000000000000001 R12: 00000000ffffffff
[   32.603732][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   32.603912][   T12] FS:  0000000000000000(0000) GS:ff1100008902c000(0000) knlGS:0000000000000000
[   32.604129][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   32.604277][   T12] CR2: 00007fc012468000 CR3: 000000000ca8a006 CR4: 0000000000771ef0
[   32.604464][   T12] PKRU: 55555554
[   32.604555][   T12] Call Trace:
[   32.604645][   T12]  <TASK>
[   32.604710][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   32.604867][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   32.605022][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   32.605144][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   32.605264][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[   32.605388][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[   32.605508][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[   32.605626][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   32.605745][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[   32.605867][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   32.605997][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[   32.606118][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   32.606322][   T12]  cleanup_net (net/core/net_namespace.c:702)
[   32.606451][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[   32.606570][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   32.606689][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   32.606879][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   32.607005][   T12]  process_one_work (kernel/workqueue.c:3314)
[   32.607132][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   32.607257][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   32.607461][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   32.607584][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   32.607704][   T12]  kthread (kernel/kthread.c:436)
[   32.607797][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   32.608027][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   32.608154][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[   32.608279][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   32.608437][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   32.608636][   T12]  ? kthread_affine_node (kernel/kthread.c:378)


Finger prints:
rtmsg_ifinfo_build_skb:rtmsg_ifinfo:register_netdevice:register_netdev:loopback_net_init
rtmsg_ifinfo_build_skb:unregister_netdevice_many_notify:default_device_exit_batch:ops_undo_list:cleanup_net
rtmsg_ifinfo_build_skb:rtmsg_ifinfo:netif_close_many:unregister_netdevice_many_notify:default_device_exit_batch
rtmsg_ifinfo_build_skb:rtmsg_ifinfo:__dev_notify_flags:netif_change_flags:rtnl_newlink